Electromagnetic device with two conductive coils, first and second yokes, stabilizing magnets and actuating magnets

Patent metadata

Field	Value
Publication number	US-12034348-B2
Application number	US-202017439261-A
Country	US
Kind code	B2
Filing date	Feb 4, 2020
Priority date	Mar 15, 2019
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

An electromagnetic device includes a conductive coil, a main magnet pivoting about an axis XX′, a first and second yoke, a first and second stabilizer magnet, as well as a first and second actuator magnet arranged to slide along the axis YY′ that is perpendicular to the pivot axis XX′, in such a way as to force the main magnet to adopt an equilibrium position, the stabilizer magnets are arranged such that this sliding is accompanied by a movement of the stabilizer magnets so as to position one of the stabilizer magnets in a given position in order to limit the leaks which could occur at one of the two yokes.

First claim

The invention claimed is:

1. An electromagnetic device comprising:
one or two conductive coils;
a main magnet able to pivot about a pivot axis XX′ between two equilibrium positions,
a first and a second yoke arranged to guide the magnetic flux generated by the main magnet,
a first and a second pair of magnets, comprising, respectively, a first and a second stabilising magnet, as well as a first and a second actuating magnet arranged to slide along each of the directions defined by an alignment axis YY′ of said actuating magnets and of the main magnet, perpendicular to the pivot axis XX′, so as to force the main magnet to adopt one or other of the equilibrium positions, the stabilising magnets being arranged so that this sliding is accompanied by a movement of the stabilising magnets so as to position the stabilising magnet, paired with the actuating magnet forcing the main magnet into one of the equilibrium positions of the main magnet, in a given position enabling said stabilising magnet to oppose the magnetic leaks liable to occur at one of the two yokes.

2. The device according to claim 1 , wherein the first yoke and the second yoke are symmetrical with each other with respect to the pivot axis XX′.

3. The device according to claim 1 , wherein the device is either an electromagnetic-energy converter or an electromagnetic microgenerator.

4. A switch comprising the device according to claim 1 .

5. The device according to claim 1 , wherein the first and the second yoke each comprise, respectively, a first and a second air gap, and, when the main magnet is in the given position, the stabilising magnet in question is opposite one of the air gaps, the polarity of the stabilising magnets being oriented to oppose the magnetic leaks liable to occur at the air gap opposite which it is located.

6. The device according to claim 5 , wherein the first and the second actuating magnet, as well as the first and the second stabilising magnet, are arranged so as to slide simultaneously and integrally, advantageously the first and the second actuating magnet and the first and the second stabilising magnet are held in fixed connection by a sliding rail.

7. The device according claim 5 , wherein the device comprises a first and a second face, respectively, on either side of a plane P 3 perpendicular to the planes P 1 and P 2 , the first and the second stabilising magnet being arranged so as to be placed opposite, respectively, the first and the second air gap by the second face.

8. The device according to claim 7 , wherein the polarity of the stabilising magnets is perpendicular to the plane P 3 .

9. The device according to claim 5 , wherein, as soon as a stabilising magnet is put opposite one of the air gaps, the other stabilising magnet makes a movement of retracting from the other air gap.

10. The device according to claim 5 , wherein the first and the second air gap are disposed respectively on either side of a plane P 1 formed by the pivot axis XX′ and the alignment axis YY′.

11. The device according to claim 10 , wherein the first pair of magnets and the first air gap on the one band and the second pair of magnets and the second air gap on the other hand are disposed respectively on either side of a plane P 2 perpendicular to the alignment axis YY′, and passing through the pivot axis XX′.

12. The device according to claim 11 , wherein the first stabilising magnet and the second stabilising magnet are arranged so that, whether the first actuating magnet forces the main magnet into one of the two equilibrium positions, the first stabilising magnet is opposite the first air gap, while, when the second actuating magnet forces the main magnet into the other of the two equilibrium positions, the second stabilising magnet is opposite the second air gap.

13. The device according to claim 11 , wherein the first and the second actuating magnet each have a polarity in a plane perpendicular to the planes P 1 and P 2 , and antiparallel to each other.

14. The device according to claim 13 , wherein an axis, referred to as the first axis, carrying the polarity of the first actuating magnet, and another axis, referred to as the second axis, carrying the polarity of the second actuating magnet, each form a non-zero angle alpha with the alignment axis YY′.

15. The device according to claim 14 , wherein the first air gap and the intersection of the first axis with the plane P 2 on the one hand, and the second air gap and the intersection of the second axis with the plane P 2 are disposed respectively on either side of the plane P 1 .

16. The device according to claim 14 , wherein the second air gap and the intersection of the first axis with the plane P 2 on the one hand, and the first air gap and the intersection of the second axis with the plane P 2 are disposed respectively on either side of the plane P 1 .

Assignees

• Commissariat Energie Atomique

Inventors

• Boisseau Sébastien
• Alessandri Baptiste
• Boucaud Matthieu
• Delette Gérard
• Tosoni Olivier

Classifications

• H02K35/06

  with moving flux distributors, and both coil systems and magnets stationary · CPC title

• H02K7/1853

  driven by intermittent forces · CPC title

• H02K35/02 Primary

  with moving magnets and stationary coil systems · CPC title